Defensive publication

ABSTRACT

THE RECORDING MATERIAL INCLUDES A SUPPORT SUCH AS PAPER OR POLYMERIC PHOTOGRAPHIC SUPPORTS CARRYING A LAYER OF METALLIC CONDUCTING MATERIAL, E.G. ALUMINUM OR NICKEL AND COATED THEREON A MIXTURE OF BIVALENT IONS, SUCH AS PROVIDED BY ZINC ACETATE, AND TETRAZOLIUM SALT. THE METALLIC LAYER CATALYZES THE FORMATION OF A FORMAZAN DYE IMAGE UPON EXPOSURE OF THE ELEMENT TO AN ELECTRON BEAM INCLUDING LASER BEAMS SO AN IMAGE IS OBTAINED HAVING HIGHER DENSITY THAN OBTAINABLE IS ABSENCE OF THE METALLIC CONDUCTING LAYER AND BIVALENT IONS. THE RATE OF FORMATION OF THE DYE ENHANCEMENT IS ACCELERATED BY HEAT. IN ONE EXAMPLE, AN ALUMINUM COATED POLYESTER SUPPORT IS COATED WITH A MIXTURE OF A POLYAMIDE BINDER, ZINC ACETATE AND 2,3,5-TRIPHENYL-2H-TETRAZOLIUM CHLORIDE. AN IMAGE IS OBTAINED BY EXPOSURE TO A 15 KV., 50 NA. ELECTRON GUN SOURCE USING ABOUT 1.6X1**-9 COULOMBS CURRENT EXPOSURE AND POST-EXPOSURE PROCESSING AT 150*C. FOR 5 SECONDS. THE ABOVE SUBJECT MATTER MAY BE EMBODIED IN PATENT APPLICATIONS PENDING IN FOREIGN COUNTRIES.

DEFENSIVE PUBMQATIQN UNITED STATES PATENT OFFICE Published at therequest of the applicant or owner in accordance with the Notice of Dec.16, 1969, 869 0.G. 687. The abstracts of Defensive Publicationapplications are identified by distinctly numbered series and arearranged chronologically. The heading of each abstract indicates thenumber of pages of specification, including claims and sheets ofdrawings contained in the application as originally filed. The files ofthese applications are available to the public-for inspection andreproduction may be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to themerits of alleged invention. The Patent Ofllce makes no assertion as tothe novelty of the disclosed subject matter;

PUBLISHED AUG. 1, 1972 1901.008 ELECTRON BEAM RECORDING PHOTOGRAPHICMATERIAL Raymond F. Reithel, Kodak Park Works, 2000 Lake Ave.,Rochester, N.Y. 14615 Filed May 28, 1971, Ser. No. 148,137 Int. Cl. G03c1/76 US Cl. 96-67 No Drawing. 9 Pages Specification The recordingmaterial includes a support such as paper or polymeric photographicsupports carrying a layer of metallic conducting material, e.g. aluminumor nickel and coated thereon a mixture of bivalent ions, such asprovidcd by zinc acetate, and a tetrazolium salt. The metallic layercatalyzes the formation of a formazan dye image upon exposure of theelement to an electron beam ineluding laser beams so an image isobtained having higher density than obtainable in absence of themetallic conducting laycr and bivalent ions. The rate of formation ofthe dye enhancement is accelerated by heat. In one example, an aluminumcoated polyester support is coated with a mixture of a polyamidc binder,zinc acetate and 2,3,S-triphenyl-ZH-tetrazoiium chloride. An image isobtaincd by exposure to a 15 kv., 50 na. electron gun source using about1.6 10- coulombs current exposure and post-exposure processing at 150 C.for 5 seconds. The above subject matter may be embodied in patentapplications pending in foreign countries.

